JPS5833523Y2 - Chiyotsukakudo Mataha Enchiyokudo Hanbetsu Sochi - Google Patents

Description

[Detailed description of the invention] The present invention is designed to check whether or not the electrode is correctly installed vertically in electrical machining equipment such as electrical discharge machining equipment and electrolytic machining equipment. This invention relates to a perpendicularity or verticality determining device used when checking whether or not the invention is installed on a vehicle.

Conventionally, the mounting posture of these electrodes has been checked using a dial gauge.

The specific method is as follows.

That is, while fixing the dial gauge at an appropriate position,
The tip of the probe is brought into contact with the reference axis of the electrode or tile that is the object to be measured, and while the stem of the processing device is raised and lowered, the deflection of the pointer of the dial gauge is observed to check the verticality of the electrode, etc. There is.

However, in this known method, it is necessary to raise and lower the stem of the processing device several times for checking, which not only takes time to properly attach the electrodes, etc.
In the case of electrical processing equipment, the above-mentioned checks must be carried out within a narrow processing tank, which often makes the work difficult.

The present invention was developed based on the above-mentioned viewpoints, and its purpose is to be able to easily use it even in narrow spaces, and to improve the stem of processing equipment in order to check the verticality of electrodes, etc. To provide a perpendicularity or perpendicularity determining device which does not need to be raised or lowered, can correct the mounting posture while always looking at the pointer of a meter, and can therefore easily attach electrodes, etc.

Hereinafter, the details of the present invention will be explained with reference to the drawings.

Fig. 1 is a partial sectional view showing one embodiment of the discrimination device according to the present invention, Fig. 2 is its electric circuit diagram, Fig. 3 is its output characteristic diagram, and Fig. 4 is another embodiment. FIG. 3 is an electrical circuit diagram illustrating an example.

In FIG. 1, 1 is an L-shaped square ruler, and 2 is a processing device (not shown).

) horizontally movable support set, 3 and 3' are square rulers 1
A micrometer head is fixed to one of the supporting arms 1a, 4 is a case that houses the electric circuit part, 5 is the object to be measured, and 6 in Fig. 2 generates an alternating current of several hundred KHz. Constant voltage AC power supply, I and 7' are discharge tubes, 8 and 8' are resistors, 9 and 9' are ammeters, 10 and 10' are amplifiers,
11 and 11' are voltmeters.

The micrometer heads 3 and 3' are mounted so that their stems 3a and 3'a are perpendicular to the reference plane 1b of the arm 1a of the square ruler 1. Pole plates 3b and 3'b are attached to one end of 'a through insulating members 3c and 3'c, respectively.

In addition, 3d and 3'd are knobs with ratchet handles for moving the stems 3a and 3'a, 3e and 3'e
is a scale for measuring the amount of movement.

As shown in the figure, the square ruler 1 is mounted on a horizontally movable support 2 of a processing device using an appropriate method, such as a magnetic chuck (not shown).

)K, the electrode plates 3b and 3'b are mounted so as to face the surface of the object to be measured 50 with a small gap therebetween.

Moreover, the electric circuit shown in FIG. 2 except for the voltmeters 11 and 11' is housed inside the case 4, and the ammeters 9 and 9' are connected through the windows 4a and 4b of the case 4 to read their indicated values. The voltmeters 11 and 11' are also mounted on other appropriate parts of the processing equipment so as to be able to read the voltmeters.

The discharge tubes 7 and 7' are, for example, mercury-filled neon tubes,
A pair of electrodes each? a, 7b and 7'a.

In addition to 7'b, it has intermediate electrodes 1c and 7'c.

These 1,000 pairs of electrodes are connected to a constant voltage AC power source 6 via resistors 8 and 81 and ammeters 9 and 9', respectively, and intermediate electrodes 7c and 7'c are connected to the micrometer heads 3 and 3, respectively. 'The pole plates 3b and 3'b are connected.

The electrode plates 3b and 3'b are opposed to the object to be measured 5 through a small gap, and therefore have capacitances Co and C, respectively, with the object to be measured 5 as one pole. 'o' constitute capacitors co and C'o.

With this configuration, the discharge current of the discharge tubes 7 and 7' depends on the change in the capacitor capacitance Co or C'o, that is, the gap X between the electrode plate 3b or 3'b and the surface of the object to be measured 50.
It is known that the temperature changes as shown in FIG. 3 in response to changes in .

Therefore, now set the scales 3e and 3'e of the micrometer heads 3 and 3' to match 5K, in other words, set the plates 3b and 3'b so that they are located on the same vertical plane, Furthermore, when the gap X is set so that Xl and X<X2 as shown in FIG.
and 9', or the difference in the indicated values of the voltmeters 11 and 11', the verticality of the object to be measured 5 (to be precise, the verticality in the plane of the paper in FIG. 1) is immediately determined.

) can be tested for quality. Therefore, the operator only has to correct the mounting posture of the object to be measured 5 so that the readings of these instruments match within the allowable error range, and this work is extremely simple compared to the above-mentioned known methods. .

Also, the final check of the above work should be done using a micrometer.
This can be done more precisely by rotating the knob 3d or 3'd of the head 3 or 3' to match the indications of these instruments, and then comparing these scales 3e and 3'e.

In addition, in the above explanation, it was explained that X 1 hehe 2 in Figure 3 was used as the measurement range, but while the discharge current changes extremely sharply in this range, the measurement range is extremely narrow.

However, X in the figure is the measurement range.

It is also possible to use -X3, which has a wide measurement range, although this range includes a nonlinear characteristic part.

Furthermore, since the two measurement ranges mentioned above can be used freely, it is extremely convenient for work.

Next, FIG. 4 will be explained.

FIG. 4 shows another electric circuit that can be used in place of the electric circuit shown in FIG. ,
15 is a voltmeter, and L, Ll and L2 are the inductances of the corresponding parts in the figure, C5C1 and C
2 represents a capacitor connected in parallel to the inductances L, L1 and L2, and its capacitance.

Therefore, C and L, C1 and Ll, and C2 and L2 all form a tank circuit with a tuning frequency f, and C
When o=C'o, both inputs of the differential amplifier 140 are configured to be balanced.

Therefore, when the verticality of the multiplexing measurement object 5 is poor, the input balance of the differential amplifier 14 is lost, and the differential amplifier 14 generates an output according to the degree of the verticality. , the output thereof is observed by the voltmeter 15.

Therefore, in this embodiment, as in the above-mentioned embodiment, it is possible to easily check the verticality of the object to be measured 5 and correct its posture.

Since the present invention is constructed as described above, it is possible to easily and reliably determine the perpendicularity or verticality of an electrode, etc. even in a narrow place such as inside a processing tank of an electric processing device. It is something.

Note that the configuration of the present invention is not limited to the above-mentioned embodiments, and for example, all known electrical circuits may be used within the scope of the present invention for an electric circuit for comparing capacitances Co and C'o. It is possible to use the circuits, meters, etc. of It is preferable to use a needle-like electrode 43 as described in the latter case as the poles 3b and 3'b.

Further, the shape of the right angle ruler is not limited to the fixed cursive shape as described above, but various types of right angle rulers and angle rulers can be used within the scope of the purpose of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view showing one embodiment of the discrimination device according to the present invention, Fig. 2 is its electric circuit diagram, Fig. 3 is its output characteristic diagram, and Fig. 4 is another embodiment. FIG. 1... Right angle ruler, 3, 3'... Micrometer head, 5... Object to be measured, 7, 7'
...Discharge tube.

Claims (1)

[Scope of utility model registration request] A right-angle ruler, a plurality of micrometer heads provided on one arm of the right-angle ruler so that the main axis of the stem thereof is perpendicular to a reference plane of the one arm, and a distal end surface of the stem and a cover opposite thereto. 1. A perpendicularity or verticality determining device, comprising: a measuring object surface; and a detector that detects the capacitance of a capacitor constituted by a measuring object surface.